Anemometer Rotating Vane and Thermistor Sensing Method Data Logging Yes Humidity Sensing Yes Velocity (FPM) 98 to 3937 fpm Velocity (MPS) 0.5 to 20 mps Air Velocity Accuracy +/-3 Percent Air Volume 0 to 99 999 cfm Temp Range -4 Degrees to 140 Degrees F Relative Humidity Range 0.1 Percent to 99.9 Percent Probe Size 0.70 in dia Cord Length 3.3 ft Data Hold Yes Auto Power Off Yes Interface USB Storage Capacity 12 000 Readings Calibration Certificate NIST